Battery system management device and method for determining the optimal number of batteries

Abstract

A battery system management device according to an embodiment of the present invention may include at least one processor and a memory that stores at least one instruction executed by the at least one processor. Here, the at least one instruction may include an instruction to define an equivalent model for a battery system including a plurality of batteries and one or more protection elements formed in a predetermined connection structure, an instruction to calculate, using the equivalent model, a short-circuit current generated in the battery system when a short circuit occurs at a specific position within the battery system, an instruction to compare the calculated short-circuit current with a limit current of the protection element, and an instruction to determine the number of batteries to be provided in the battery system based on the comparison result.

Claims

1. At least one processor, and Includes a memory connected to the at least one processor and storing at least one instruction executed through the at least one processor, The at least one instruction is, An equivalent model for a battery system having a predetermined connection structure and including multiple batteries and one or more protective elements, is used to calculate the short-circuit current generated in the battery system when a short circuit occurs at a specific location within the battery system, based on the time constant characteristics of the connecting elements in the predetermined connection structure. A command to compare the calculated short-circuit current with the limit current of the protection element, and The command includes determining the number of batteries to be provided in the battery system based on the comparison results. The command to calculate the aforementioned short-circuit current is: The command includes a command to calculate the short-circuit current applied to each of the multiple protection elements based on the time constant characteristics of the connecting elements in the predetermined connection structure when a short circuit occurs at one or more locations. The location where the short circuit occurs is, A device including one or more of the following positions: a first position defined as inside a battery; a second position defined as between batteries and their connection points; a third position defined as between a battery connection point and a battery group connection point; and a fourth position defined as between a battery group connection point and a power converter.

2. The aforementioned protective element is The device according to claim 1, which is positioned at one or more of the following locations: the input / output side of a battery, the battery connection point, and the battery group connection point.

3. The at least one instruction further includes an instruction defining the equivalent model for the battery system, The instruction that defines the equivalent model is: The apparatus according to claim 1, comprising instructions for defining an equivalent model for the battery system based on a first equivalent model for the battery, a second equivalent model for the protective element, and a third equivalent model for a connecting element that electrically connects the battery to an external device.

4. The third equivalent model described above is: The apparatus according to claim 3, defined as an RL equivalent circuit having a resistance value and inductance corresponding to the length of the connecting element.

5. The instruction to be compared is, The apparatus according to claim 1, comprising a command to check whether the short-circuit current exceeds a limit current defined based on the short-circuit capacity of each of the multiple protective elements.

6. The command to determine the number of batteries is: The apparatus according to claim 1, comprising a command for determining the maximum number of batteries such that the short-circuit current applied to each of the protective elements does not exceed the limit current of each of the protective elements.

7. At least one processor, and Includes a memory connected to the at least one processor and storing at least one instruction executed through the at least one processor, The at least one instruction is, An equivalent model for a battery system having a predetermined connection structure and including multiple batteries and one or more protective elements, is used to calculate the short-circuit current generated in the battery system when a short circuit occurs at a specific location within the battery system, based on the time constant characteristics of the connecting elements in the predetermined connection structure. A command to compare the calculated short-circuit current with the limit current of the protection element, and The command includes determining the number of batteries to be provided in the battery system based on the comparison results. The command to determine the number of batteries is: Includes a command to determine the maximum number of batteries so that the short-circuit current applied to each protection element does not exceed the limit current of each protection element, The command to calculate the aforementioned short-circuit current is: The command includes a command to calculate the short-circuit current applied to each of the protection elements based on the time constant characteristics of the connecting elements in the predetermined connection structure, for each case in which a short circuit occurs at multiple locations. The command to determine the number of batteries is: A device that includes a command to determine the maximum number of batteries such that the short-circuit current applied to each protective element does not exceed the limit current of each protective element in all cases.

8. The command for determining the maximum number of batteries is: Instructions to redefine the equivalent model by changing the number of batteries included in the battery system according to the comparison result of the short-circuit current and the limit current, and The apparatus according to claim 7, comprising an instruction to recalculate the short-circuit current based on a redefined equivalent model.

9. A method performed by a computer, A step of using an equivalent model for a battery system having a predetermined connection structure and including multiple batteries and one or more protective elements, to calculate the short-circuit current generated in the battery system when a short circuit occurs at a specific location in the battery system, based on the time constant characteristics of the connecting elements in the predetermined connection structure. A step of comparing the calculated short-circuit current with the limit current of the protection element, and The process includes the step of determining the number of batteries to be provided in the battery system based on the comparison results, The step of calculating the short-circuit current is: The step includes calculating the short-circuit current applied to each of the plurality of protection elements based on the time constant characteristics of the connecting elements in the predetermined connection structure when a short circuit occurs at one or more locations. The location where the short circuit occurs is, A method comprising one or more positions among a first position defined as inside a battery, a second position defined as between batteries and battery connection points, a third position defined as between a battery connection point and a battery group connection point, and a fourth position defined as between a battery group connection point and a power converter.

10. The aforementioned protective element is The method according to claim 9, wherein the battery is positioned at one or more of the input / output sides of the battery, the battery connection points, and the battery group connection points.

11. The method further includes the step of defining the equivalent model for the battery system, The step of defining the equivalent model is: The method according to claim 9, comprising the step of defining an equivalent model for the battery system based on a first equivalent model for the battery, a second equivalent model for the protective element, and a third equivalent model for a connecting element that electrically connects the battery to an external device.

12. The third equivalent model described above is: The method according to claim 11, defined as an RL equivalent circuit having a resistance value and inductance corresponding to the length of the connecting element.

13. The aforementioned comparison step is, The method according to claim 9, further comprising the step of checking whether the short-circuit current for each of the multiple protective elements exceeds a limit current defined based on the short-circuit capacity of the protective element.

14. The step of determining the number of batteries is: The method according to claim 9, comprising the step of determining the maximum number of batteries such that the short-circuit current applied to each of the protective elements does not exceed the limit current of each of the protective elements.

15. A method performed by a computer, A step of using an equivalent model for a battery system having a predetermined connection structure and including multiple batteries and one or more protective elements, to calculate the short-circuit current generated in the battery system when a short circuit occurs at a specific location in the battery system, based on the time constant characteristics of the connecting elements in the predetermined connection structure. A step of comparing the calculated short-circuit current with the limit current of the protection element, and The process includes the step of determining the number of batteries to be provided in the battery system based on the comparison results, The step of determining the number of batteries is: The step includes determining the maximum number of batteries such that the short-circuit current applied to each protection element does not exceed the limit current of each protection element, The step of calculating the short-circuit current is: The step includes calculating the short-circuit current applied to each of the protection elements based on the time constant characteristics of the connecting elements in the predetermined connection structure for each case in which a short circuit occurs at multiple locations. The step of determining the number of batteries is: A method comprising the step of determining the maximum number of batteries such that the short-circuit current applied to each of the protective elements does not exceed the limit current of each protective element for all cases.

16. The step of determining the maximum number of batteries is: The steps include: redefining the equivalent model by changing the number of batteries included in the battery system according to the comparison result of the short-circuit current and the limit current; and The method according to claim 15, comprising the step of recalculating the short-circuit current based on a redefined equivalent model.

17. A computer program that causes the computer to perform the method described in any one of claims 9 to 16.

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